Where does the president stand? Measuring presidential ideology

Although estimating the revealed preferences of members of Congress is straightforward, estimating the position of the president relative to Congress is not. Current estimates place the president as considerably more ideologically extreme than one would expect. These estimates, however, are very sensitive to the set of presidential positions used in the roll call analyses for the 103rd through 109th Congresses. The president often obtains more moderate ideal point estimates relative to Congress when including positions based on signing bills into law.